Any ideas on these pieces??

[fwcrawford]

Some pieces I found a while back around an old house site.
The two small items are about the diameter of a quarter where the flange is.
They appear to be made of bronze or brass.
The other item is brass or copper and about the size of a silver dollar.
I don't see any markings or designs on any of them.
One of the small items has some rings around the shaft that may indicate it was slipped into something and the rings acted to lock it in place like a barbed fitting.
Not much else I can say to provide help on these items.
Thanks in advance for any help,
Felix

 

[Oldguy]

Just a guess, the small items look like finials for a lamp (they hold the lampshade on), the larger item may be part of the lampshade.

 

[1859large]

The hollow domed thingy looks like a knob for a door or cabinet, missing the base of course.